diff --git a/graphrag/index.py b/graphrag/index.py
index a2914c19f..cdc77fb98 100644
--- a/graphrag/index.py
+++ b/graphrag/index.py
@@ -86,13 +86,15 @@ def build_knowlege_graph_chunks(tenant_id: str, chunks: List[str], callback, ent
     for i in range(len(chunks)):
         tkn_cnt = num_tokens_from_string(chunks[i])
         if cnt+tkn_cnt >= left_token_count and texts:
-            threads.append(exe.submit(ext, texts, {"entity_types": entity_types}, callback))
+            for b in range(0, len(texts), 16):
+                threads.append(exe.submit(ext, ["\n".join(texts[b:b+16])], {"entity_types": entity_types}, callback))
             texts = []
             cnt = 0
         texts.append(chunks[i])
         cnt += tkn_cnt
     if texts:
-        threads.append(exe.submit(ext, texts))
+        for b in range(0, len(texts), 16):
+            threads.append(exe.submit(ext, ["\n".join(texts[b:b+16])], {"entity_types": entity_types}, callback))
 
     callback(0.5, "Extracting entities.")
     graphs = []